Machine for clinching friction covers to cans



Dec. 26,1933. J. J. ENGELMAN MACHINE FOR CLINCHING FRICTION COVERS TO CANS Filed Feb. 20, 1931 4 Sheets-Sheet l Bec. 26, 1933. A

Filed Feb. 20, 1931 4 Sheets-Sheet 2 DC 26, 1933 J. .1. ENGELMAN MACHINE FOR CLINCHING FRICTION COVERS TO CANS Filed Feb. 20, 1931 4 Sheets-SheeI 3 Dec. 26, 193'3. J. J. ENGELMAN 1,940,667

MACHINE FOR CLINCHING FRIGTION COVERS TO CANS Filed Feb. 20, 1951 4 Sheets-Shea?I 4 y Z7 f6:

@(9 @fC/Q Patented Dec. 26, 193?,

y UNITED STATES Y MACHINE Fon CLINCHING Fmo'rroN covEas To cANs Joseph John Engelman, Chicago, Ill., assigner to Continental Can Company, Inc., New York, Ni Y., a corporation of New York Application February` 20,l 1931 Y Serial No. 517,356

3 claims. (orne-is)- The invention `relates to new. and useful improvements in a machine for clinching a friction cover to a can. Y

An object of the invention is to provide a machine which may be utilized for forming in the cover, clinching detents which interlock with the friction wall on the can top for retaining the frictionally seatedcover on the can.

A further object of the invention is to provide a clinching mechanism of theV above type wherein the clinching toolsare caused to perform Stheir operation by a vertical movement of the clinching head into engagement with the can top.

These and other objects Will in part be obvious and will in part be hereinafter more-fully disclosed.

In the drawings which show byway of illustration one embodiment ofthe `inventi`on Figure 1 is a view in side elevation showing a machine embodying the improvements;

Fig. 2 is a planview of the clincher head removed from` the reciprocating spindle therefor; Fig. 3 is a sectionalviewlon the line 3-3 of Fig. 2, with theY head in contact with the can top;

Fig. 4 is asectional view on the' line 4-4 of Fig. 2, with the head removed from contactwith the can top; .i f

Fig. 5 .is ajbottom' plan vview of the clincher head; i

Fig. 6 isan enlargedysectional view through a portion `of the clincherhead 'and the can top when thehead 'first makes contact with the can tolfhand`v`l i l 'Fig-7' is a view similar to Fig. 6, but showing the continued downward movement of the head and the operation of the'clinching tools for indenting the cover to lock the same to the can top. The invention has to do with a machine for formingV af cover with detents which are so located relative to the friction wall as to cooperate therewith in locking the friction cover on its..

seat on the can top. The inventionis shown asl applied to a machine which is used Afor locking a friction cover to a can top of the tripletite chai'- acter.` In Figs. 6 and 7, a canof this'type is shown Whichlincludes a body portion 1 to whicha can top 2 is'secured by a double seam 3. Thecan top is provided with a depression forming an outer friction wall 4,4 an intermediate frictionl wall 5, and a rolled portion at the upper edge of the intermediate friction wall 5, which provides a third or inner friction wall 6 on the can top.-

The cover is indicated at 7. The 'cover has an annular depression which-forms an outer friction wall 8 adapted to cooperate with the friction wall 4, and an intermediate friction wall 9 adapted to cooperate with the friction wall 5.- The cover also' has adepression forming a Wall 10 which extends down inside of the friction Wall 6 and makes `frictional .engagement therewith. The 60 purpose of the present invention is to provide this 4 wall `10 of the cover withdetents which project outwardly underneath `the friction Wall 6 on the can top for thus positively locking the; cover to the can, so that` during shipment there is no 5 liability'of the cover being separated from the can. This is accomplished zby a clinching tool 11 having a relatively sharp nose `12-which1is forced against the walllO and forms indentations therein, one of which isindicated'in Fig. 7 at 70 13. There are a series of theseclinchingtools, which form a series of spaced indentations. .The invention is directed to themeansfor H operating these clinching tools for` forming the indentations referred to. diagrammatically in Fig.1,.consists of Va portable; supporting stand 14 provided with a standard 15.r which: is threaded so that it. can be raisedand lowered by means of a control nut 16. Attached to theupper end of. the standard 15 `is the frame 30 17 of thernachine.` Attached to this frameisa A Work supporting bracket 18` carrying a table 19 on which the can is placed for. the operation of the clinching head. kThe can is indicated atfC in the drawings. The. table isl provided `with a 85HA curved gauge plate 20v for centering the can on the table beneath the `clinching Ahead. The 1. clinching head is indicated as a Whole at 2l. It iscarried by a reciprocating spindle 22.\A Said spindle is provided witha rack 23 With which av 907. y

pinion engages for raising and lowering the clinching head. vA motor M is provided for operating the spindle. Control clutch member 24 may be provided for shifting the point of connection between the vspindle 22 and the sleeve 95 member 22a which reciprocates the spindle. This sleeve member 22a is provided with a Vcross head 22h with which Aa 'roller 22C cooperates.V This roller 22e iscarried by `a .crank eccentrically` mounted on the end of a shaft 22d. The shaft 100 is connected to alfdriving gear Vwheel 22e Vthat y meshes with a gear `Wheel 22j on a counter-shaft carryingva gear wheel 22g, and this gear` wheel meshes witha gear wheel on the shaft of the motor M; As the vshaft 22d is rotated theL crank 105 Wheel causes the cross head 22h to be `raised and lowered, and this will raise and lower the spindle.

vAt thelower end of the spindle 22 is a supporting c plate 25 to which the clinching head-is attached by suitable bolts 26, 26.*;The detached `110- Themachine as shown clinching head is shown in'Figs. 2 to 7, inclusive. Said clinching head includes a main supporting plate 27 into which the bolts 26 are threaded Said main supporting plate is provided with a central sleeve member'28 whichprojectsdown'-4 wardly from the lower face of the plate. Located4l within this sleeve member is an operating cani 29Y which engages and forces the clinching'tools This operatingcam is secured to the plate 27 by means against the metal for indenting the same.

of a bolt 30, Shims 31 may be 4placedat .the bot. tom of the sleeve pocket in which thefcamfis mounted for regulating thepositionnfthe. cam. A key 32 carried by the cam'membere'ngages a slot in the plate 27 and prevents anytiirnin'g.

movement of this control cam. The ilower' end of the control cam is Vcone-shaped as indicated i atea. f

The clinching head includesl av movable. plate;

member 34. This plate member 34 hasa central recess 35 therethrough which is shaped-.so aste t` over the deitiending..sleeve'portion.28.V The` plate. member 341 is. attached to Vthe-.supporting plate 27.by bolts .36- j portionand a sleeve,v portion `37 and an .enlarged head at the upperendof the..sleeVeportion-37.

the spindle22, theheadsof. the bolts'will congl-"tact with'the bottomsofthefrecesses 38in which theyV are located,V and the plate member 34.will Ythen be lifted vwith .thesupporting plate 27. The supporting plate 27 isuprovided with a series of recesses 39.. 'The vplate.member 34is likewise Lmprivided withea` series, of.recesses 40..whichaare directly opposed tothe` .recesses 39,. and in .each

pai-rI of recessesisa spring4l. These 'are com.

pression springs, and they serve, toY move. the.y

plate member .'iflaway. fromthe supporting plate E E27.v This movement; aslnoted above, is. limited by.. tli`e=-heads "of the` bolts. engagingthe .bottomsof the recesses inthe supporting plate. 427.2A

There are a series` of-isupportingbolts r36.A

tin wallsl4 and5. Thisrib. extendsdown into this recess toapointwell below the frictionwall y j- ?6 softhat the friction walls and9 aresupported by-this annular rib. `Thexmetal plate .42 is se-v Y cured to the plate Vmember 34 byscrews 44.. This.V

metal plate 42 contacts .withthe double seam join-f ing the can top tothe can body, and the Vannular 50rib43 passesl into4 the recess :of the` cover and serves as an abutment for supporting the can` parts during the clinching operation.VVV

The platemember 34 is provided witha series ofradial recesses 45. Ineach recess is located g`..aclinching toolill. There is a circular recess which is crossed bythese recesses 45, andlin each circular recess is a pivot sleeve-x46 carrying a pivot pin 47 on `which the clinching toolsll:v is.

supported. The pivotsleeve46isslotted so as y to allow the clinching tool to swing-freely therein for a limited distance. At theupper end-ofi this Vsleeve v46 is a'flange-'48 -lwhich overlies theupper face of `the supporting-member 34;K A vclamping plate-49de seeuredto theupperffaceofthe sup.- 754 portingnp'late 34--byscrews- 50.- 'Il-'hisclamping.``

Each bolt has..a .threaded plate overlies the flanges and firmly holds the pivot sleeves in place.

Each clinching tool is in the form of an elbow member. The portion 5l thereof at the elbow is rounded so astomake contact with the control camv 33. A coiled spring52vextends around the clinching tools and engages theV outer faces thereof; and-'normally moves the clinching tools inwardly so that they contact with the control cam. When the parts are in the position shown in Fig. 6,. the supportingmember 34 is in its lowered position, andthe clinching tools are drawn inwardly to theirextreme limit.. This is the position of the parts of the clinching head when the head rst maires contact with the can tcp. After the supporting member 34 makes contact with the can top, it cannot'move downward any farther, and then the supporting plate 27 will move downward, compressing the springs 41. This downward movement of the supporting plate 27 rela- 'gtive .to...theplate member A34;; causesstlie .cam..33

to force. theY clinchingatools outward, swinging-: them on their pivotal supports. TheJ clinching.; nosepf each; toolg. whernthe. vclinchingahead. first makesrcontactwithrthe canltep, isslightIy. abovelcigg the..lower wall'. of.;the v depression. in-.the fcan ,topgrc andpslightlyretracted fromitheffriction .yi/fall; 16.3.

in the can top. When-the supportingfgplate moves;v downward,A theseg'clinchingt4 tools .will beL-carried downward f slightly, and forced;` onward. by. the el cam 3 33 which; causes the,` nosespf :the f clinchingl; toolsto .engagethewall 10 and-form indentations therein.v These... indentations. project: outwardly i underneath the friction wallv 61011. the. carrtcp,

and therebyJ the covergis -'locked totthei can topfiir; so that it cannot be dislodged during handling.A

The .coverfhoweven maycbeffforcibly:pried 01T,

and thewindentations pulled bythe kfrictionwalle;` In OldelztO' aomplish-this removal'. of;v the: cover,

however, agreater;liftingfpressureiisfnecessalyri permitlthelhead togjbe ,flirted-ffrorn,l theggc'anI top. "Atfthe lowerface.` of :the plate: member34 is a 50`3metal plate. 42 which is Vprovided .with aV depend-"f ing annular rib.43fwhichI is shapedso as to fit within the recess'inthe coverzbetween the fricthe friction wall. They retain their usualgformi,

and: allthathasbeenqeie'cted'bygthe eline g .head'is ,thelforming of-thje locking. detents which;

secure the friction cover to the can .top Y. -f Y It will be notedrthat the V.tsuppeIiting-.fplatey. 27' has.. a: depending..skirt '.53 whichf extends down over the. supporting;membenl. and .thus houses the; upper end .tl'iereo.f;.` When itjis desired-@3315 increasev the. extent foffthegindenations,.fthisican be readily accomplishedby adjustir1-gfthelv posi-1 tion` of the. controln.ca1n 33:: 'When shini s.jare v added,l theV cam -is loweredJand-s thelisize; ofpthe.; indentationsincreased. When thetshims..-arerrer.;` moved, thenethe cam .is raised,. andfthe. .size 0f; the indentations formed rna'y. be..` decreasedi` Y It will .be notedfrorn .thejabovelthat a-rcljnch: ing Ahead :has been.r provided which .-is.. .operatedf byl a verticalmovementmofcthelclinching headllz into contact .f with .the.,canr, top. When tl,1e1 21i.13.j isplaced on. the supportingaptablepandlmovem; against the.=.gaugei 20,3'it contacts with the. conf. trol arm.54 which sets=into;operationrthefisp' dle122; and.;wlien thecan-,is rempyedsfvhazfp:

meV

tionof the spindle will stop until another can is placed against this control arm 54. The clinching head may, however, be ,fixed and the support moved toward and from the clinching head and the same result accomplished. n

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what lI- claim as new and desire to secure by `Letters- Patent, is`

l. A machine for clinchingv a cover having friction walls which form a recess therebetween to a .can having a portion double seamed to imparting a relative movement to said support' and clinching head, said clinching head including an upper member and a lower member having a relative movement, springs between said members forseparating the same, clinching tools carried by said lower' member, a cam carried by the upper member and adapted to engage said tools for operating the `same when said upper and lower members are moved toward each other, said lower member having means for engaging the can at the double seam and having an annular projecting rib on the lower face thereof adapted to enter a recess between the friction Walls in the cover, said ribl operating as an abutment for supporting the can parts during the clinching operation. l

2. A machine for clinching covers to cans comprising a can support, a clinching head disposed above said support, said support and said head being movable relative to each other, said clinchcentrally of the upper member and having a cone-shaped lower end adapted to engage the clinching tools at the elbow thereof for moving said tools outwardly when the members are moved toward eachother.

3. A machine for clinching covers to cans comprising a can support, a clinching head disposed above said support, said support andsaid head being movable relative to each other, said clinching head including an upper member and a lower member having a movement relative to the upper Y member, springs between said members for normally holding the same separated, said lower! member having radial recesses formed therein, elbow-shaped clinching toolsv pivoted to said member and swinging in' said recesses radially -of the head, a coiled contracting spring surrounding all of said clinching tools and normally moving said tools inwardly, a cam located centrally of the upper member and having a cone-shaped lower end adapted to engage the clinching tools at the elbow thereof for Inov-V ing said tools outwardly when the members are moved toward each other, and means for shifting the position of said cam for varying the extent of movement imparted to the clinching tools.

Y JOSEPH JOHN ENGELMAN.

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